Electric heater.



W. STANLEY.

ELECTRIC HEATER.

` APPLICATION I'LED SEPT. '1, 1912. 1,060,718. Patented May 6,1913.

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I/TTNESSES s JNYEAZTUH I@ W2 LJM STANLEAC wf /M 717. H15 TTHNEY':

-external body, and inlorder thattheapparaf -tusv may be efficient forcooking and like which comprisesan element which is inter- 4.5 earth lorvother suitable material. The constructionis such that a portion of theheat UNITED. STATES WILLIAM STANLEY, or GREAT BARmNGToN, MASSACHUSETTS,.fissieiior't- To" PaTENToEEicE-.y :t

G ENERaLELEcTaIQ COMPANY, A coRPoRATioNvoEj'NEW 'Yoan ELEcTnIo EMTER. f

citizen of the United-- States, residingatjspecification.

Great Barringtoifn' county of Berkshire,

I State of Massachuse tts-, -V haveinvented certain nev'v and useful'Improvements in Elec.;

tric Heaters, lof which the following -ent No. 1,025,843, and .in -iny.,applicatioii,

15l low rate; and may occur during periods when i of 'this' chara'cte`rheat isis'tored' electrically in a mass o material'vvhichhas `hi heatstoragecapacity.l Such storage may eat a the load on Lthecentralistation is otherwise low I'n` connection with the said devicesprovision. vis made for conducting theheat from'the storage mass, whendesiregL-*to'ai'i operations, provision is made for al rapid? 'floiv 'ofthe said;` heatQf' This result yis secured by providing a path'of highthermal conductivity .fromA the heat storage vmass tothe bodytobeheated." In v the devices specifi-f cally disclosed-in'inyapplication and patent liereinbefore referred-to, this path is pro- IposedQbetwee'n the storage mass-0r a portion thereof and the bodyfto beheated.-

y The object' of' thepresent invention is to render the storage massaccessible'for cook?A ingo'r other operations Without theinterposition'f: 'an auxiliary element and. at the sameptiine toeffectively insulate it against heat losses. i

- easily accessible and Vthat various sizes of 'According to myinvention I utilize a heat storage mass composed of materialsuch as.iron lhaving high heat storage capacity and high thermal conductivityand surround such storage .mass vvith vheat insulation yvhich may vbepowdered silica, 4iniusorial insulation is removable to exposea portionof the surface of the heat storage mass. In order that the surface soexposed shall be y cooking utensils, etc., may be placed in con# I'.tact therewith, it is located substantially flush with or beyond theadjacent surfaces of z all :portions thereofi's very rapid.

."thei stove' r Preferably. 4 is vsubstaiitially fliish. therewithbecause of the better heat insulation-'thus secured.. .The said 4su'frface -is of such 'contourias to contact .intimately'-wi'thSpcification otLettevr's-Iatent. 'patlilteudilllaiy I Animangameaspismiieraisis. f seriai Nemesis.

cooking utensilsl or. other bodies 4'Which 4may placed thereon.- Thev'said-` s'urfafce also ofsuch dimensions and is 'so'connected With allportions of the heat storage mass that' sullicient heat -vvill be"conductedthere-A through 'for cookingandflike operations.. By reasonlof .this structure fthe. apparatus' may be veryconvenientlyutilized.forfthe' merely -cooki ng or other 4operation-:since..

' .ver and .requires 4the removalof aflightf the placing-vof. theAcooking 'utensilf or. oth-'er body in contact with the exposed'portionof.

the heat storage .mass. By 'reasonjof thefact' that the heatj storagemass possesses no't'only -higlijheat storage cap'acity butfalso high Myinvention 1Willbe more .clearly hinder-' 'A ing the heat storage mass 10 vvhi'ch may be Preferably, as shown of any desired shape. in thedrawing,it is a sphere having its'top "stood by areference' tothe-accompanying drawing and. to the following'description.l In the said.drawing is vshovvna vertical s ec-4 portion flattened.' The top surface.should vbe of. such dimensions that suiiijcientheat Will be conductedtherethrough for cooking and "like opei'ations,4 Owing to vthev shape'Aof the heat storage mass the aforesaid .sur

face is in good thermal conductive relation. Wit-h all portions 'of thesame. .The said storage mass is composedof iron or other materialVhaving high heatI storage capacit-y and high thermal conductivity.lVitliiii the storage iiiass is inserted theelectrical 're. si'stanceunit 11 which-may .beof any of tlie- Well-known types, suc-h as thecartridge type disclosed in Vogel Patent No. 839,343. Theheat storagemass is contained Within a casing 1Q, preferably of metal. I-Icatinsulating material 13 such as powdered silica, infusorial earth orothersuitable heat insulationm'ay be packed between' the 4casing andthestorage mass. That portion il of the casing-.constituting thetop of thebody portion of the-stove and Which extends between t-heheat storagemass and the side may have a suitable handle 21. The bot` walls of the.casing is preferably composed of metal such as that disclosed inDempster Patent o. 901,428, having high thermal resistance. The conduit15 through Which the conductors 16 extend to the electric heat unit 11'is preferably also composed of that metal. A plug 17 may be inserted inthe end of the said conduit to afford connection between the conductors16 and the conductors 18 leading to an e 'ternal source of electriccurrent. The top surface of the heat storage mass 10 is substantiallyflush With the top of the body ort-ion of the stove. The cover for thestolfe'is removable and comprises the metal shell 19 which may be filledWith heatA insulation 20. The cover tom Q2 of the cover is preferablycomposed of high resist-ance metal.

By means of the electric heat unit 11, heat may be supplied at suchtimes and at such rates as are consistent with efficiency and economy.Loss of heat by radiation and conduction is prevented by means of theheat insulationand by reason of the factt-hat the metal parts whichcontact Wit-l1 the heat storage mass have high thermal resistance. stovefor 'cooking or other operation the cover may be readily removed thusexpos ing the flat surface of the heat storage mass and the cookingutensil or other articles may be placed4 upon the same. Owing to thehigh thermal conductivity of the heatstorage mass, a path of highthermal conductivity is provided leading to the body to be heated, andheat is supplied at a very high rate.

Various modifications of the above appa ratus may be made Withoutdeparting from When it is desired to utilize theA the spirit of myinvention, the scope of which is set forth in the following claims.

What I claim as'nevv and desire to secure by Letters Patent of theUnited States, is

1. In a heatstorage stove, a body portion comprising a heat insulatingcasing and a stationary heat storage mass having high thermalconductivity contained within said `casing and having a portion thereofextending so that its end surface is at least substantially Hush withone face of said casing and a removable cover adaptedAto be placed overthe end surface of the said portion of the heat storage mass.

2. In a heat storage stove, a storage mass having high thermalconductivity, heat insulation normally surrounding said v heat storagemass, a portion of said heatinsulation being removable to expose asurface of the said heat storage mass,'said surface being substantiallyfishfwith the surrounding insulation and intgoodhthermal conductiverelation With all' "portions of the heat storage mass.

'3. In a heat storage stove, a body portion comprising a -heat ystoragemass havingI vhigh thermal conductivity and heat insula- ,tion locatedaround the samel but leaving the top thereof exposed,` said top of theheat storage mass being substantially flush With the top of the bodyportion of the stove, and a removable cover for the said body portion.

In Witness whereof, I have hereunto set my hand this third day ofSeptember, 1912.

WILLIAM STANLEY.

Vitnesses WILLIAM W. STANLnY, F. G. LARAMEE.

LStaples of this patent may Ue obtained for lve cents each, byaddressing the Commissioner o1 Patenta- Washington, D. 0.

